emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Cleanup of init

Browse Source
This commit is contained in:
Eric Andersen 1999-10-28 00:24:35 +00:00
parent a745606df3
commit c7c41d306b
2 changed files with 126 additions and 212 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

169
init.c
View File

@ -52,7 +52,7 @@
#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
static char *console = CONSOLE;
static char *first_terminal = "/dev/tty1";
//static char *first_terminal = "/dev/tty1";
static char *second_terminal = "/dev/tty2";
static char *log = "/dev/tty3";
@ -83,7 +83,7 @@ void message(char *device, char *fmt, ...)
int fd;
va_list arguments;
if ((fd = device_open(device, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
if ((fd = device_open(device, O_WRONLY|O_NOCTTY|O_NDELAY)) >= 0) {
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
@ -98,18 +98,13 @@ void message(char *device, char *fmt, ...)
}
/* Set terminal settings to reasonable defaults */
void set_term()
void set_term( int fd)
{
int fd;
struct termios tty;
if ((fd = device_open(console, O_RDWR | O_NOCTTY)) < 0) {
message(log, "can't open %s\n", console);
return;
}
ioctl(fd, TCGETS, &tty);
tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
tty.c_cflag |= HUPCL | CLOCAL;
tcgetattr(fd, &tty);
tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
tty.c_cflag |= HUPCL|CLOCAL;
tty.c_cc[VINTR] = 3;
tty.c_cc[VQUIT] = 28;
@ -122,14 +117,11 @@ void set_term()
tty.c_cc[VSTOP] = 19;
tty.c_cc[VSUSP] = 26;
/* Set pre and post processing */
tty.c_iflag = IGNPAR | ICRNL | IXON | IXANY;
tty.c_oflag = OPOST | ONLCR;
tty.c_lflag = ISIG | ICANON | ECHO | ECHOCTL | ECHOPRT | ECHOKE;
tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY;
tty.c_oflag = OPOST|ONLCR;
tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE;
/* Now set the terminal line. */
ioctl(fd, TCSETS, &tty);
close(fd);
tcsetattr(fd, TCSANOW, &tty);
}
static int mem_total()
@ -175,6 +167,7 @@ static void console_init()
int tried_vtmaster = 0;
char *s;
fprintf(stderr, "entering console_init()\n");
if ((s = getenv("CONSOLE")) != NULL)
console = s;
else {
@ -183,7 +176,7 @@ static void console_init()
}
if ( stat(CONSOLE, &statbuf) && S_ISLNK(statbuf.st_mode)) {
fprintf(stderr, "/dev/console does not exist, or is a symlink.\n");
fprintf(stderr, "Yikes! /dev/console does not exist or is a symlink.\n");
}
while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
if (!tried_devcons) {
@ -218,42 +211,14 @@ static int waitfor(int pid)
}
static int run(const char *command, char *terminal, int get_enter)
static pid_t run(const char * const* command,
char *terminal, int get_enter)
{
int f, pid;
char *args[16];
char buf[256];
char *ptr;
int i;
pid_t pid;
static const char press_enter[] =
"\nPlease press Enter to activate this console. ";
/* Make a proper command from the command string */
strcpy(buf, command);
ptr = buf;
for (f = 1; f < 15; f++) {
/* Skip white space */
while (*ptr == ' ' || *ptr == '\t')
ptr++;
args[f] = ptr;
/* May be trailing space.. */
if (*ptr == 0)
break;
/* Skip this `word' */
while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
ptr++;
/* If end-of-line, break */
if (*ptr == '#' || *ptr == 0) {
f++;
*ptr = 0;
break;
}
/* End word with \0 and continue */
args[f] = NULL;
}
args[0] = args[1];
if ((pid = fork()) == 0) {
/* Clean up */
close(0);
@ -261,22 +226,11 @@ static int run(const char *command, char *terminal, int get_enter)
close(2);
setsid();
#if 1
//if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
if ((f = device_open(terminal, O_RDWR )) < 0) {
message(log, "open(%s) failed: %s\n",
terminal, strerror(errno));
return -1;
}
dup(f);
dup(f);
#else
open(terminal, O_RDWR);
dup(0);
dup(0);
//tcsetpgrp(0, getpgrp());
#endif
set_term();
tcsetpgrp(0, getpgrp());
set_term(0);
if (get_enter) {
/*
@ -288,32 +242,30 @@ static int run(const char *command, char *terminal, int get_enter)
* specifies.
*/
char c;
write(1, press_enter, sizeof(press_enter) - 1);
write(0, press_enter, sizeof(press_enter) - 1);
read(0, &c, 1);
message(console, "Got an enter\r\n");
}
/* Log the process name and args */
message(console, "Executing '%s'\r\n", command);
message(log, "Executing '%s'\r\n", command);
/* Now run it. This program should take over this PID,
/* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
execvp(args[1], args + 1);
message(log, "Executing '%s', pid(%d)\r\n", *command, getpid());
execvp(*command, (char**)command+1);
message(console, "Hmm. Trying as a script.\r\n");
message(log, "Hmm. Trying as a script.\r\n");
/* If shell scripts are not executed, force the issue */
if (errno == ENOEXEC) {
char buf[256];
args[1] = SHELL;
args[2] = "-c";
strcpy(buf, "exec ");
strcat(buf, command);
args[3] = buf;
args[4] = NULL;
execvp(args[1], args + 1);
char * args[16];
args[0] = SHELL;
args[1] = "-c";
args[2] = "exec";
for( i=0 ; i<16 && command[i]; i++)
args[3+i] = (char*)command[i];
args[i] = NULL;
execvp(*args, (char**)args+1);
}
message(console, "Could not execute '%s'\n", command);
message(log, "Could not execute '%s'\n", command);
exit(-1);
}
return pid;
@ -323,6 +275,8 @@ static int run(const char *command, char *terminal, int get_enter)
#ifndef DEBUG_INIT
static void shutdown_system(void)
{
const char* const swap_off_cmd[] = { "/bin/swapoff", "-a", 0};
const char* const umount_cmd[] = { "/bin/umount", "-a", "-n", 0};
message(console, "The system is going down NOW !!\r\n");
sync();
@ -337,8 +291,8 @@ static void shutdown_system(void)
message(console, "Sending SIGKILL to all processes.\r\n");
kill(-1, SIGKILL);
sleep(1);
waitfor(run("/bin/swapoff -a", console, 0));
waitfor(run("/bin/umount -a -n", console, 0));
waitfor(run( swap_off_cmd, console, 0));
waitfor(run( umount_cmd, console, 0));
sync();
if (get_kernel_revision() <= 2 * 65536 + 2 * 256 + 11) {
/* Removed bdflush call, kupdate in kernels >2.2.11 */
@ -369,18 +323,21 @@ static void reboot_signal(int sig)
extern int init_main(int argc, char **argv)
{
int run_rc = TRUE;
int pid1 = 0;
int pid2 = 0;
pid_t pid = 0;
pid_t pid1 = 0;
pid_t pid2 = 0;
struct stat statbuf;
const char *init_commands = SHELL " -c exec " INITSCRIPT;
const char *shell_commands = SHELL " -";
const char *tty0_commands = init_commands;
const char *tty1_commands = shell_commands;
const char* const swap_on_cmd[] = { "/bin/swapon", " -a ", 0};
const char* const init_commands[] = { SHELL, " -c", " exec ", INITSCRIPT, 0};
const char* const shell_commands[] = { SHELL, " -", 0};
const char* const* tty0_commands = init_commands;
const char* const* tty1_commands = shell_commands;
char *hello_msg_format =
"init started: BusyBox v%s (%s) multi-call binary\r\n";
"init(%d) started: BusyBox v%s (%s) multi-call binary\r\n";
const char *no_memory =
"Sorry, your computer does not have enough memory.\r\n";
pid = getpid();
#ifndef DEBUG_INIT
/* Set up sig handlers */
@ -392,21 +349,20 @@ extern int init_main(int argc, char **argv)
signal(SIGUSR2, reboot_signal);
signal(SIGINT, reboot_signal);
signal(SIGTERM, reboot_signal);
#endif
/* Figure out where the default console should be */
console_init();
/* Turn off rebooting via CTL-ALT-DEL -- we get a
* SIGINT on CAD so we can shut things down gracefully... */
#ifndef DEBUG_INIT
reboot(RB_DISABLE_CAD);
#endif
/* Figure out where the default console should be */
console_init();
/* Close whatever files are open, and reset the console. */
close(0);
close(1);
close(2);
set_term();
//set_term(0);
setsid();
/* Make sure PATH is set to something sane */
@ -414,16 +370,17 @@ extern int init_main(int argc, char **argv)
putenv(PATH_DEFAULT);
/* Hello world */
message(log, hello_msg_format, BB_VER, BB_BT);
message(console, hello_msg_format, BB_VER, BB_BT);
message(log, hello_msg_format, pid, BB_VER, BB_BT);
fprintf(stderr, hello_msg_format, pid, BB_VER, BB_BT);
/* Mount /proc */
if (mount("/proc", "/proc", "proc", 0, 0)) {
message(console, "Mounting /proc: failed!\r\n");
message(log, "Mounting /proc: failed!\n");
} else {
message(console, "Mounting /proc: done.\r\n");
if (mount("/proc", "/proc", "proc", 0, 0) == 0) {
fprintf(stderr, "Mounting /proc: done.\n");
message(log, "Mounting /proc: done.\n");
} else {
fprintf(stderr, "Mounting /proc: failed!\n");
message(log, "Mounting /proc: failed!\n");
}
/* Make sure there is enough memory to do something useful */
@ -432,15 +389,15 @@ extern int init_main(int argc, char **argv)
int retval;
retval = stat("/etc/fstab", &statbuf);
if (retval) {
message(console, "%s", no_memory);
fprintf(stderr, "%s", no_memory);
while (1) {
sleep(1);
}
} else {
/* Try to turn on swap */
waitfor(run("/bin/swapon -a", console, 0));
waitfor(run(swap_on_cmd, console, 0));
if (mem_total() < 2000) {
message(console, "%s", no_memory);
fprintf(stderr, "%s", no_memory);
while (1) {
sleep(1);
}
@ -466,11 +423,11 @@ extern int init_main(int argc, char **argv)
* start up some VTs if somebody hits enter...
*/
for (;;) {
int wpid;
pid_t wpid;
int status;
if (pid1 == 0 && tty0_commands) {
pid1 = run(tty0_commands, first_terminal, 1);
pid1 = run(tty0_commands, console, 1);
}
if (pid2 == 0 && tty1_commands) {
pid2 = run(tty1_commands, second_terminal, 1);

169
init/init.c
View File

@ -52,7 +52,7 @@
#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
static char *console = CONSOLE;
static char *first_terminal = "/dev/tty1";
//static char *first_terminal = "/dev/tty1";
static char *second_terminal = "/dev/tty2";
static char *log = "/dev/tty3";
@ -83,7 +83,7 @@ void message(char *device, char *fmt, ...)
int fd;
va_list arguments;
if ((fd = device_open(device, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
if ((fd = device_open(device, O_WRONLY|O_NOCTTY|O_NDELAY)) >= 0) {
va_start(arguments, fmt);
vdprintf(fd, fmt, arguments);
va_end(arguments);
@ -98,18 +98,13 @@ void message(char *device, char *fmt, ...)
}
/* Set terminal settings to reasonable defaults */
void set_term()
void set_term( int fd)
{
int fd;
struct termios tty;
if ((fd = device_open(console, O_RDWR | O_NOCTTY)) < 0) {
message(log, "can't open %s\n", console);
return;
}
ioctl(fd, TCGETS, &tty);
tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
tty.c_cflag |= HUPCL | CLOCAL;
tcgetattr(fd, &tty);
tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
tty.c_cflag |= HUPCL|CLOCAL;
tty.c_cc[VINTR] = 3;
tty.c_cc[VQUIT] = 28;
@ -122,14 +117,11 @@ void set_term()
tty.c_cc[VSTOP] = 19;
tty.c_cc[VSUSP] = 26;
/* Set pre and post processing */
tty.c_iflag = IGNPAR | ICRNL | IXON | IXANY;
tty.c_oflag = OPOST | ONLCR;
tty.c_lflag = ISIG | ICANON | ECHO | ECHOCTL | ECHOPRT | ECHOKE;
tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY;
tty.c_oflag = OPOST|ONLCR;
tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE;
/* Now set the terminal line. */
ioctl(fd, TCSETS, &tty);
close(fd);
tcsetattr(fd, TCSANOW, &tty);
}
static int mem_total()
@ -175,6 +167,7 @@ static void console_init()
int tried_vtmaster = 0;
char *s;
fprintf(stderr, "entering console_init()\n");
if ((s = getenv("CONSOLE")) != NULL)
console = s;
else {
@ -183,7 +176,7 @@ static void console_init()
}
if ( stat(CONSOLE, &statbuf) && S_ISLNK(statbuf.st_mode)) {
fprintf(stderr, "/dev/console does not exist, or is a symlink.\n");
fprintf(stderr, "Yikes! /dev/console does not exist or is a symlink.\n");
}
while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
if (!tried_devcons) {
@ -218,42 +211,14 @@ static int waitfor(int pid)
}
static int run(const char *command, char *terminal, int get_enter)
static pid_t run(const char * const* command,
char *terminal, int get_enter)
{
int f, pid;
char *args[16];
char buf[256];
char *ptr;
int i;
pid_t pid;
static const char press_enter[] =
"\nPlease press Enter to activate this console. ";
/* Make a proper command from the command string */
strcpy(buf, command);
ptr = buf;
for (f = 1; f < 15; f++) {
/* Skip white space */
while (*ptr == ' ' || *ptr == '\t')
ptr++;
args[f] = ptr;
/* May be trailing space.. */
if (*ptr == 0)
break;
/* Skip this `word' */
while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
ptr++;
/* If end-of-line, break */
if (*ptr == '#' || *ptr == 0) {
f++;
*ptr = 0;
break;
}
/* End word with \0 and continue */
args[f] = NULL;
}
args[0] = args[1];
if ((pid = fork()) == 0) {
/* Clean up */
close(0);
@ -261,22 +226,11 @@ static int run(const char *command, char *terminal, int get_enter)
close(2);
setsid();
#if 1
//if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
if ((f = device_open(terminal, O_RDWR )) < 0) {
message(log, "open(%s) failed: %s\n",
terminal, strerror(errno));
return -1;
}
dup(f);
dup(f);
#else
open(terminal, O_RDWR);
dup(0);
dup(0);
//tcsetpgrp(0, getpgrp());
#endif
set_term();
tcsetpgrp(0, getpgrp());
set_term(0);
if (get_enter) {
/*
@ -288,32 +242,30 @@ static int run(const char *command, char *terminal, int get_enter)
* specifies.
*/
char c;
write(1, press_enter, sizeof(press_enter) - 1);
write(0, press_enter, sizeof(press_enter) - 1);
read(0, &c, 1);
message(console, "Got an enter\r\n");
}
/* Log the process name and args */
message(console, "Executing '%s'\r\n", command);
message(log, "Executing '%s'\r\n", command);
/* Now run it. This program should take over this PID,
/* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
execvp(args[1], args + 1);
message(log, "Executing '%s', pid(%d)\r\n", *command, getpid());
execvp(*command, (char**)command+1);
message(console, "Hmm. Trying as a script.\r\n");
message(log, "Hmm. Trying as a script.\r\n");
/* If shell scripts are not executed, force the issue */
if (errno == ENOEXEC) {
char buf[256];
args[1] = SHELL;
args[2] = "-c";
strcpy(buf, "exec ");
strcat(buf, command);
args[3] = buf;
args[4] = NULL;
execvp(args[1], args + 1);
char * args[16];
args[0] = SHELL;
args[1] = "-c";
args[2] = "exec";
for( i=0 ; i<16 && command[i]; i++)
args[3+i] = (char*)command[i];
args[i] = NULL;
execvp(*args, (char**)args+1);
}
message(console, "Could not execute '%s'\n", command);
message(log, "Could not execute '%s'\n", command);
exit(-1);
}
return pid;
@ -323,6 +275,8 @@ static int run(const char *command, char *terminal, int get_enter)
#ifndef DEBUG_INIT
static void shutdown_system(void)
{
const char* const swap_off_cmd[] = { "/bin/swapoff", "-a", 0};
const char* const umount_cmd[] = { "/bin/umount", "-a", "-n", 0};
message(console, "The system is going down NOW !!\r\n");
sync();
@ -337,8 +291,8 @@ static void shutdown_system(void)
message(console, "Sending SIGKILL to all processes.\r\n");
kill(-1, SIGKILL);
sleep(1);
waitfor(run("/bin/swapoff -a", console, 0));
waitfor(run("/bin/umount -a -n", console, 0));
waitfor(run( swap_off_cmd, console, 0));
waitfor(run( umount_cmd, console, 0));
sync();
if (get_kernel_revision() <= 2 * 65536 + 2 * 256 + 11) {
/* Removed bdflush call, kupdate in kernels >2.2.11 */
@ -369,18 +323,21 @@ static void reboot_signal(int sig)
extern int init_main(int argc, char **argv)
{
int run_rc = TRUE;
int pid1 = 0;
int pid2 = 0;
pid_t pid = 0;
pid_t pid1 = 0;
pid_t pid2 = 0;
struct stat statbuf;
const char *init_commands = SHELL " -c exec " INITSCRIPT;
const char *shell_commands = SHELL " -";
const char *tty0_commands = init_commands;
const char *tty1_commands = shell_commands;
const char* const swap_on_cmd[] = { "/bin/swapon", " -a ", 0};
const char* const init_commands[] = { SHELL, " -c", " exec ", INITSCRIPT, 0};
const char* const shell_commands[] = { SHELL, " -", 0};
const char* const* tty0_commands = init_commands;
const char* const* tty1_commands = shell_commands;
char *hello_msg_format =
"init started: BusyBox v%s (%s) multi-call binary\r\n";
"init(%d) started: BusyBox v%s (%s) multi-call binary\r\n";
const char *no_memory =
"Sorry, your computer does not have enough memory.\r\n";
pid = getpid();
#ifndef DEBUG_INIT
/* Set up sig handlers */
@ -392,21 +349,20 @@ extern int init_main(int argc, char **argv)
signal(SIGUSR2, reboot_signal);
signal(SIGINT, reboot_signal);
signal(SIGTERM, reboot_signal);
#endif
/* Figure out where the default console should be */
console_init();
/* Turn off rebooting via CTL-ALT-DEL -- we get a
* SIGINT on CAD so we can shut things down gracefully... */
#ifndef DEBUG_INIT
reboot(RB_DISABLE_CAD);
#endif
/* Figure out where the default console should be */
console_init();
/* Close whatever files are open, and reset the console. */
close(0);
close(1);
close(2);
set_term();
//set_term(0);
setsid();
/* Make sure PATH is set to something sane */
@ -414,16 +370,17 @@ extern int init_main(int argc, char **argv)
putenv(PATH_DEFAULT);
/* Hello world */
message(log, hello_msg_format, BB_VER, BB_BT);
message(console, hello_msg_format, BB_VER, BB_BT);
message(log, hello_msg_format, pid, BB_VER, BB_BT);
fprintf(stderr, hello_msg_format, pid, BB_VER, BB_BT);
/* Mount /proc */
if (mount("/proc", "/proc", "proc", 0, 0)) {
message(console, "Mounting /proc: failed!\r\n");
message(log, "Mounting /proc: failed!\n");
} else {
message(console, "Mounting /proc: done.\r\n");
if (mount("/proc", "/proc", "proc", 0, 0) == 0) {
fprintf(stderr, "Mounting /proc: done.\n");
message(log, "Mounting /proc: done.\n");
} else {
fprintf(stderr, "Mounting /proc: failed!\n");
message(log, "Mounting /proc: failed!\n");
}
/* Make sure there is enough memory to do something useful */
@ -432,15 +389,15 @@ extern int init_main(int argc, char **argv)
int retval;
retval = stat("/etc/fstab", &statbuf);
if (retval) {
message(console, "%s", no_memory);
fprintf(stderr, "%s", no_memory);
while (1) {
sleep(1);
}
} else {
/* Try to turn on swap */
waitfor(run("/bin/swapon -a", console, 0));
waitfor(run(swap_on_cmd, console, 0));
if (mem_total() < 2000) {
message(console, "%s", no_memory);
fprintf(stderr, "%s", no_memory);
while (1) {
sleep(1);
}
@ -466,11 +423,11 @@ extern int init_main(int argc, char **argv)
* start up some VTs if somebody hits enter...
*/
for (;;) {
int wpid;
pid_t wpid;
int status;
if (pid1 == 0 && tty0_commands) {
pid1 = run(tty0_commands, first_terminal, 1);
pid1 = run(tty0_commands, console, 1);
}
if (pid2 == 0 && tty1_commands) {
pid2 = run(tty1_commands, second_terminal, 1);